Lattice Light Steel Frame System and Application

2011 ◽  
Vol 105-107 ◽  
pp. 1110-1113
Author(s):  
Bo Ding ◽  
Huan Qing Jiang ◽  
Hong Xia Wan ◽  
Feng Zhang
Keyword(s):  
High Speed ◽  
Design Method ◽  
Calculation Model ◽  
Steel Frame ◽  
Calculation Results ◽  
Frame System ◽  
Practical Engineering ◽  
Steel Consumption ◽  
New Type ◽  
New System

Lattice light steel frame is a new type of structural system, combining general steel framework which is composed of lattice column and lattice beam with lattice light steel keel of the partitions and floors, the system takes full advantages of both structural systems, with high speed construction, less steel consumption, good earthquake-resistance etc., and possesses good prospects. The paper describes the system construction approach and the characteristics of lattice light steel frame system, and provides a project example of a villa. The design method and calculation model of the project are presented. Calculation results meet the specifications’ requirements, proving the new system can be applied to practical engineering. The paper gives guidance for application and research of this new system.

A New Kind of Modular Assembly Steel Structure System

2014 ◽  
Vol 578-579 ◽  
pp. 741-744
Author(s):  
Zai Hua Zhang ◽  
Xing Ping Shu ◽  
Ran He
Keyword(s):  
Steel Structure ◽  
Steel Frame ◽  
Modular Assembly ◽  
Structure System ◽  
Assembly Structure ◽  
Frame System ◽  
New Type ◽  
Structure Engineering

As a new type of structure system suitable for the realization of building industrialization, assembly structure system is a trend in the development of steel structure engineering. In this paper, a kind of assembly truss beam steel frame system is proposed. The composition of system, the technology characteristic of components and connections are analyzed in detail. Meanwhile some problems need to be solved are also put forward.

scholarly journals Film Stiffness Analysis for Angular Contact Ball Bearings Considering Thermal Effect

2015 ◽  
Vol 9 (1) ◽  
pp. 156-159 ◽  
Author(s):  
Chun L. Lei ◽  
Zhi Y. Rui ◽  
Qin Wu ◽  
Jun F. Guo ◽  
Li N. Ren
Keyword(s):  
Film Thickness ◽  
High Speed ◽  
Ball Bearing ◽  
Elastohydrodynamic Lubrication ◽  
Calculation Model ◽  
Frictional Heat ◽  
Ball Bearings ◽  
Angular Contact Ball Bearing ◽  
Calculation Results ◽  
Film Stiffness

In order to more accurately calculate the film stiffness of angular contact ball bearing, it is necessary to establish the film stiffness calculation model that is consistent with reality. The frictional heat exists in high-speed ball bearings, and can impact on oil film thickness and stiffness. The calculation model of film stiffness of an angular contact ball bearing taking account of the effects of viscous heating was proposed based on the elastohydrodynamic lubrication theory. The central film thickness and film stiffness have been determined. An example was calculated with this derived equation and the result was compared with that given in other literatures. The calculation results show that the central film thickness decreases and the film stiffness increases when friction heating are considered.

SCISSORING ORIGAMI INSPIRED DEPLOYABLE BRIDGE FOR A DISASTER

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Kotaro Adachi ◽  
Ichiro Ario ◽  
Yuki Chikahiro ◽  
Shuichi Ono
Keyword(s):  
Design Method ◽  
Numerical Approach ◽  
Calculation Model ◽  
Rescue Work ◽  
Work Site ◽  
Method Of Calculation ◽  
Significant Damage ◽  
Rescue System ◽  
New Type ◽  
Secondary Disasters

Many natural disasters cause not only critical situations for facilities and resident's life, but also significant damage to economy. It is obvious that quick rescue action must be undertaken and that there are many problems due to the occurrence of secondary disasters at rescue work-site. For example, many bridges were damaged by a huge earthquake in 2011 in Japan’s Tohoku areas, called the Great East Japan Earthquake. We need to develop a new rescue structure to survive these disasters. We have to consider how to rebuild damaged infrastructures and how to build a new type of rescue system. Therefore, we suggest a new type of emergency bridge, Mobile bridge(MB). In this paper, we discuss the scissors type of bridge in order to evaluate its numerical approach including a reinforced strut and characteristics. Moreover, we analyze the design method of calculation model based on theoretical equilibrium theory based on origami-folding engineering.

Design and Calculation of Explosion Rotary Cutting Deformation Test Device

2016 ◽  
Vol 693 ◽  
pp. 275-281
Author(s):  
Si Yuan Xie ◽  
Wei Hua Wei ◽  
Tong Ming Xue ◽  
De Lai Liu ◽  
Jing Wei Xu ◽  
...  
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Condition ◽  
Test Device ◽  
Physical Strength ◽  
High Speed Cutting ◽  
Calculation Results ◽  
New Type ◽  
Deformation Test ◽  
Cutting Deformation

In this paper, a new type of explosive rotary quick-off tools device is designed. This new type of explosion rotary quick-off tools test device is composed of foundation, explosion chamber, piston body, pressure plate, locking wedge and customized tools, which has many advantages such as simple structure, convenient operation and high rigidity. The calculation results of the acceleration of tool-falling, plate strength, physical strength of combustion show that the device is expected to obtain complete chip root samples at 150m/min speed conditions, which can meet the requirements of researching metal cutting deformation process at high-speed cutting condition.

Seismic Performances of Buckling-Restrained Braced Steel Frames in China, Japan and US

2014 ◽  
Vol 1065-1069 ◽  
pp. 1106-1111
Author(s):  
Mei Ling Huang ◽  
Zhao Yu Fu ◽  
En He Bao
Keyword(s):  
United States ◽  
Seismic Design ◽  
Design Method ◽  
Plastic Hinge ◽  
The United States ◽  
Steel Frame ◽  
Frame Structure ◽  
Main Research ◽  
Force Sharing ◽  
Steel Consumption

Buckling-Restrained Brace (BRB) in China, Taiwan, and Japan, as a kind of hysteretic damper has been installed into steel frame structure; In the United States, however, it has been installed into the hinge-connected steel framework, as the main seismic element in order to add lateral stiffness and strength.This paper according to the design codes of frame structure in China, Japan and the United States,establishes the research model based 0n the typical steel frame form of China, Japan, and the US.The main research parameters of the model are horizontal force sharing ratio of BRB (β) and frame strength of BRB (CB)。Through the steel consumption,the relationship of story drift and story shear, the formation of plastic hinge of the design model,it compares the steel frame seismic design method of China, Japan and the United States.The steel consumption of frame is related to the strength of the frame, but has nothing to do with the frame structure form;The plastic hinge of each model focused mainly on the BRB,reflecting the overall mechanism; As to seismic design requirements, the Japanese codes are stricter, codes of China and the United States is relatively close.

Evaluation of Behaviour of Plan Curved Structure Supported by Arch

2021 ◽  
Vol 322 ◽  
pp. 193-199
Author(s):  
Jan Trenz ◽  
Karel Zlatuška ◽  
Radim Nečas ◽  
Jiří Stráský
Keyword(s):  
Physical Model ◽  
Design Method ◽  
Steel Part ◽  
Calculation Model ◽  
Strain Gauges ◽  
University Of Technology ◽  
Upper Deck ◽  
New Type ◽  
Arch Structures ◽  
Curved Structure

New type of plan curved structure has been developed within the research of arch footbridges at Faculty of Civil Engineering of Brno University of Technology. Structural arrangement came out of study of behaviour of plan curved upper deck arch structures of various radii of curvature. The design method of such structures with ideal shape of arch was the outcome of the research. Results of numerical analysis were verified on physical model in scale 1:10, which has been built and tested. The model has been mounted with gauges – 41 strain gauges at various positions on concrete and steel part of the structure and 5 deflection sensors. Then the structure has been subjected to loads in various positions corresponding with load positions of variable loads in calculation model. The paper describes evaluation of measurement of stresses and deformations of physical model of plan curved structure supported by an arch. Obtained values of stresses and deformations were compared with values derived from FE calculation model.

Seismic Behaviour Experimental Study of the D-Type Energy Dissipating Eccentrically Brace

2011 ◽  
Vol 255-260 ◽  
pp. 2414-2420
Author(s):  
Xiu Zhen Pan ◽  
Ji Ping Hao ◽  
Jie Gao
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Cyclic Loading ◽  
Steel Frame ◽  
Lateral Stiffness ◽  
Input Energy ◽  
Seismic Behaviour ◽  
Frame System ◽  
The Cost ◽  
New System

Because the repairing work of beam and floor after earthquake were great, and the cost were higher, the generalize application of eccentrically braced steel frame were limited. A new braced steel frame system was suggested, which was energy dissipating eccentrically brace. The experimental data of new and conventional D-type eccentrically braced steel frame system were achieved by two specimens under cyclic loading. Results indicated that the new system could put off yielding, reduce earthquake input energy and breakage of the link, reduce repairing load after earthquake, and have preferable ductility and enough lateral stiffness. The new braced steel frame system which had gained patent of invention in Chinese was practical and costly that it could be applied in present project.

Light Railways as the Basic for Transport Infrastructure Development in Northern Territories of Russia

2020 ◽  
pp. 97-101
Author(s):  
P.I. Tarasov
Keyword(s):  
High Speed ◽  
Road Transport ◽  
Transport Infrastructure ◽  
The Arctic ◽  
Infrastructure Development ◽  
Capital Costs ◽  
New Type ◽  
The Republic ◽  
Northern Territories ◽  
Mode Of Transport

Research objective: studies of economic and transport infrastructure development in the Arctic and Northern Territories of Russia. Research methodology: analysis of transport infrastructure in the Republic of Sakha (Yakutia) and the types of railways used in Russia. Results: economic development of any region is proportional to the development of the road transport infrastructure and logistics. When a conventional railway is operated in the Arctic conditions, it is not always possible to maintain a cargo turnover that would ensure its efficient use, and transshipment from one mode of transport to another is very problematic. A new type of railway is proposed, i.e. a light railway. Conclusions: the proposed new type of transport offers all the main advantages of narrow gauge railroads (high speed of construction, efficiency, etc.) and helps to eliminate their main disadvantage, i.e. the need for transloading when moving from a narrow gauge to the conventional one with the width of 1520 mm, along with a significant reduction in capital costs.

Dynamic Analysis of DVG 850 High-Speed Machining Center

2012 ◽  
Vol 487 ◽  
pp. 203-207
Author(s):  
Gong Xue Zhang ◽  
Xiao Kai Shen
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Response Analysis ◽  
Improved Method ◽  
Analysis Software ◽  
Element Analysis ◽  
Harmonic Response ◽  
Machining Center ◽  
Calculation Results ◽  
Harmonic Response Analysis

Purpose, with the application of workbench finite element analysis software, get the analysis results of DVG 850 high-speed vertical machining center via the modal analysis and harmonic response analysis. Use the calculation results for reference, put forward the improved method, and prove the credibility of the simulation analysis by testing DVG 850 prototype.

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